Belt-shifter for step-pulleys.



NQ. 797,126. PATNTED AUG,. l5, 1905..

E.. KOTTUSH..

BELT SEIFTER EUR STEP PULLEYS.. APPLIGATIQN 2mm MAY 24. 1904.

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PATBNTED AUG. 15, 1905.,

E. KOTTUSGH..

BELT SHIPTBR FDR STEP PULLEYS.

APPLICATION FILED MAY Z4, 1904.

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No. 797,126. PATENT@ AUG. 15, 1905.

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BELT SHIPTER POR STEP PULLEYS AyPLIATION FILED MAY 24, 1904.

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apparatus.

UNITED STATES PATENT OFFICE.

lElELT-QHIFTEH FOR STEl-PULLEYS..

Specification of Lettere Patent.

Patented Aug. I5, i905.

Application filed May Z4, 1904. Serial No. 209,546.

To (1r/ZZ whom, 7115 may concern:

Be it known that I. EMANUEL Kor'rUsoI-I, manufacturer, a citizen of the Republic of Switzerland, and a resident of VVetZikon, near Zrich, Switzerland, have invented an Improved Belt-Shifter for StepePulleys, of which the following is a specification.

rlhis invention relates to a belt-shifter for step-pulleys, which is intended to secure certain easy and safe shifting of the belt from one pulley to another' on pulley-shafting fixed to either the roof or the wall. As compared with presently-existing belt-Shifters for effecting the same object, the present invention has the distinguishing feature that the shiftingrod (which is movable laterally in the direction of the longitudinal axis of the shafting, as usual) is fitted with as many forks as there are steps, and at the same time the bearer-arm for this forked rod is suspended so that it swings in a plane perpendicular to the longitudinal axis of the shafting, either on an axis fixed quite apart from the shafting or on the actual shafting that carries the series of pulleys. In virtue of this arrangement when the rod carrying the forks is shifted the belt can only be moved through the breadth of one step at a time-22. e., from any one step to the next one.

rlIhe drawings show, by way of example, two forms of construction of the belteshifter.

Figures l and 2 are respectively side and end views of one form of the belt-shifter. Fig. 3 is a side view of a second form of the Fig. L is a plan view of the shifter.

In the form shown in Figs. l and 2 the forked arm CZ is hung so that it can swing upon the shaft a, carrying the step-pulleys b, being fixed thereon by an adjusting-ring c. The lever j for working the shifter is fixed on the arm d by means of the hinge-pin e, on which it can turn. 'Ihe arm d carries the slide-bearing g for the shifting-rod t, which latter has forks t' facing the step-pulleys and is also connected with the lever f by the link 1. '.lhe cross-bar y' passes through the forks vf, and the object of this bar is to strengthen the said forks.

It will be seen from Figs. 1 and 2 that if the belt Z is to be shifted to the next smaller pulley the lever f has to be first pushed backward in the plane perpendicular to the axis of the shafting (see arrow l in Fig. 2) until the belt l lies between the forks vl. Then the lever f is swung to the side, (see arrow ,Q in Fig.

1,)so as to shift the belt onto the next smaller pulley. The lever is thereafter again swung forward in the plane perpendicular to the axis of the shafting (see arrow 3 in Fig. 2) until the forks pass clear of the belt, and, finally, the sliifting-rod is again moved sidewise by moving the lever f in the direction of the arrow 4r in Fig. l, and then the lever is let go. rllhe shifter will then again hang free vertically downward from the shaft, while the belt will run upon the third step of the pulley and between the next pair of forks. If the belt Z is to be shifted onto the next larger pulley, then an exactly opposite proceeding takes place. First, the lever f is pulled forward, so that the .forks pass clear of the belt, (see arrow 3 in Fig. 2,) then by moving the lever f sidewise (see arrow Q in Fig. l) the shifting-rod /t is moved so that the last pair of forks 1T c' come opposite the belt, and then the lever f is pushed backward inthe plane perpendicular to the axis of the shafting, (arrow l in Fig. 2,) so as to bring the belt in between these two forks. After the belt has been shifted onto the next smaller step in the corresponding set of pulleys (not shown) on the machine the shifting-rod t is brought back to its original position by moving the rodf sidewise, (see arrow 4 in Fig. l.) and the belt is pushed onto the next larger pulley while the lever f is let go.

The suspension of the whole shifter so that it may swing freely allows the shifter to be used both when the belt runs upward at the under side, as indicated by the dot-ted line and arrow at l, Fig. 2, or when the belt runs upward on the Lipper side, as indicated by the dotted line and arrow at 1', Fig. 2.

In the arrangement shown in Fig. 3 the arm Z does not swing about the shaft a, but about a short axle n, parallel to the shafting and lixed in a roof, wall, or other bearing mf. In other respects the construction and mode of working of this arrangement are the same as for the arrangement shown in Figs. 1 and 2.

Having now fully described my invention,

what I claim, and desire to secure by Letters Patent, is-w l. A belt-shifter for step-pulleys comprising a suspended arm which can swing freely, a guide in the arm, a shifting-rod in the guide, and a lever for shifting the rod.

2. A belt-shifter for step-pulleys comprising an arm which is suspended from the pulley-shaft and can swing in a plane perpendicular to the axis of the pulley-shaft a shiftingthe guide, a link connected to the end of the shifting-rod, and a hand-lever fulcrumed to the lower end of the arm, substantially as described.

Signed at Zrich, Switzerland, this 15th day of April, 1904.

EMANUL KOTTUSCH.

Vitnesses:

A. LIEBERKNECHT, F. DOSSENBART. 

